Answer
6.76 m/s due north
Work Step by Step
distance = speed $\times$ time
a)
$d_{1}$ = 7.2 $\times$ (22 $\times$ 60) = 9504 m
$d_{2}$ = 5.1 $\times$ (36 $\times$ 60) = 11 016 m
$d_{3}$ = 13 $\times$ (8 $\times$ 60) = 6240 m
Total distance = 9504 + 11 016 + 6240 = 26 760 m
b)
Total time = (22 + 36 + 8) $\times$ 60 = 3960 s
Average velocity
= displacement / time
= 26 760 / 3960
= 6.76 m/s due north
